Stacked type one-way throttle valve sealing structure

Abstract

The utility model discloses a stacked type one-way throttle valve sealing structure which comprises a valve body, a valve element and a valve rod, a circulation cavity is formed in the valve body, the valve element and the valve rod are both arranged in the circulation cavity in a sliding mode, the valve element is connected with the valve rod, a metal sealing ring is arranged on the circumferential side of the inner wall of the circulation cavity, and a plurality of sealing gaskets are arranged on one side of the metal sealing ring. The multiple sealing gaskets are matched with the metal sealing ring, and the metal sealing ring and the sealing gaskets are tightly attached to the peripheral side of the valve rod. According to the stacked type one-way throttle valve sealing structure, the multiple sealing gaskets are arranged, the multiple layers of stacked sealing rings are used, the sealing performance is enhanced, leakage under high pressure and high temperature is effectively prevented, and therefore the practicability and the sealing performance of the one-way throttle valve in the using process are improved; large-particle media in media can be isolated, and the sealing ring is prevented from being scoured by the large-particle media.

Description

Technical Field

[0001] This utility model relates to the field of one-way throttle valve technology, specifically to a superimposed one-way throttle valve sealing structure. Background Technology

[0002] A throttle valve is a simple flow control valve that primarily regulates flow rate or changes pressure across the valve by altering the flow cross-section as oil flows through it. For a one-way throttle valve, it throttles when the oil flows in the forward direction; when the oil flows in the reverse direction, the oil pressure pushes the valve core, creating a large channel between the valve core and the valve body, thus eliminating throttling and rendering it a one-way valve. A stacked double one-way throttle valve regulates flow rate by changing the size of the throttle port end face, achieving flow control.

[0003] Traditional one-way throttle valves typically use simple O-rings or Y-rings for sealing. While this structure is simple, under high pressure or high temperature operating environments, the seals are prone to aging, deformation, or damage, thus affecting the valve's sealing performance and service life. Therefore, there is an urgent need to design a stacked one-way throttle valve sealing structure to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a superimposed one-way throttle valve sealing structure to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A superimposed one-way throttle valve sealing structure includes a valve body, a valve core, and a valve stem. A flow cavity is formed in the valve body. The valve core and the valve stem are slidably disposed in the flow cavity. The valve core is connected to the valve stem. A metal sealing ring is disposed on the periphery of the inner wall of the flow cavity. A plurality of sealing gaskets are disposed on one side of the metal sealing ring. The plurality of sealing gaskets cooperate with the metal sealing ring. The metal sealing ring and the sealing gaskets are tightly fitted to the periphery of the valve stem.

[0007] The metal sealing ring and several sealing gaskets each have a sealing slot on one side, and several sealing gaskets each have a sealing protrusion on the other side. The sealing protrusion is inserted into the adjacent sealing slot.

[0008] A valve cover is provided on one side of the valve body, the valve cover is in contact with one of the sealing gaskets, the valve stem is located between the valve covers, and the valve stem is threadedly connected to the valve cover.

[0009] The valve body has a first flow port and a second flow port on both sides, and both the first flow port and the second flow port are connected to the flow cavity.

[0010] A side hole flow channel is provided on one side of the inner wall of the first flow port, and the side hole flow channel is connected to the flow cavity.

[0011] The valve body includes a fixed core, a sliding core, and a one-way spring. The fixed core is fixedly connected to one end of the valve stem, the sliding core is slidably disposed at one end of the fixed core, and the one-way spring is disposed between the fixed core and the sliding core.

[0012] In the above technical solution, the superimposed one-way throttle valve sealing structure provided by this utility model has the following advantages:

[0013] (1) The superimposed one-way throttle valve sealing structure provided by this utility model enhances the sealing performance by setting several sealing gaskets and using multi-layer superimposed sealing rings, effectively preventing leakage under high pressure and high temperature, thereby improving the practicality and sealing performance of the one-way throttle valve during use.

[0014] (2) The superimposed one-way throttle valve sealing structure provided by this utility model can isolate large particles of medium in the medium through the metal sealing ring, avoid the sealing ring from being eroded by large particles of medium, and thus protect several sealing gaskets, thereby extending the service life of the sealing components and reducing maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a superimposed one-way throttle valve sealing structure according to the present invention.

[0017] Figure 2 This is a schematic diagram of the valve body cross-section structure provided for an embodiment of the superimposed one-way throttle valve sealing structure of this utility model.

[0018] Figure 3 This invention provides an embodiment of a superimposed one-way throttle valve sealing structure. Figure 2 Enlarged structural diagram at point A in the middle.

[0019] 1. Valve body; 3. Valve cover; 4. Valve stem; 5. First outlet; 6. Second outlet; 7. Side hole channel; 8. Flow chamber; 9. Valve core; 10. Valve cover; 11. Metal sealing ring; 12. Sealing slot; 13. Sealing gasket; 14. Sealing protrusion; 15. Fixed core; 16. Sliding core; 17. One-way spring. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-3 As shown in the figure, the present invention provides a superimposed one-way throttle valve sealing structure, including a valve body 1, a valve core 9, and a valve stem 4. A flow cavity 8 is provided in the valve body 1. The valve core 9 and the valve stem 4 are slidably disposed in the flow cavity 8. The valve core 9 is connected to the valve stem 4. A metal sealing ring 11 is provided on the periphery of the inner wall of the flow cavity 8. A plurality of sealing gaskets 13 are provided on one side of the metal sealing ring 11. The plurality of sealing gaskets 13 cooperate with the metal sealing ring 11. The metal sealing ring 11 and the sealing gaskets 13 are tightly fitted to the periphery of the valve stem 4. A sealing slot 12 is provided on one side of the metal sealing ring 11 and the plurality of sealing gaskets 13. A sealing protrusion 14 is provided on the other side of the plurality of sealing gaskets 13. The sealing protrusion 14 is inserted into the adjacent sealing slot 12.

[0022] Specifically, in this embodiment, the multiple sealing gaskets 13 are made of different materials (such as rubber, polytetrafluoroethylene, etc.). Sealing rings of different materials can provide excellent wear resistance and chemical corrosion resistance for different working environments. By designing multiple sealing gaskets 13 in multiple layers, the wear of the sealing gaskets 13 can be reduced, the economy and operational stability of the valve can be improved, and the sealing performance can be enhanced, effectively preventing leakage under high pressure and high temperature. At the same time, the metal sealing ring 11 can effectively prevent the sealing gaskets 13 from being damaged by the scouring of large particles of media. The metal material of the metal sealing ring 11 is made of stainless steel. Through the sealing protrusion 14 and the sealing slot 12, the stability when multiple sealing gaskets 13 and metal sealing ring 11 are stacked can be improved, so that multiple sealing gaskets 13 and metal sealing ring 11 have better sealing performance.

[0023] This utility model provides a superimposed one-way throttle valve sealing structure. A valve cover 3 is provided on one side of the valve body 1. The valve cover 3 is in contact with one of the sealing gaskets 13. The valve stem 4 is located between the valve covers 3 and is threadedly connected to the valve cover 3. A first flow port 5 and a second flow port 6 are respectively opened on both sides of the valve body 1. The first flow port 5 and the second flow port 6 are both connected to the flow cavity 8. A side hole flow channel 7 is opened on one side of the inner wall of the first flow port 5 and is connected to the flow cavity 8. The valve body 1 includes a fixed core 15, a sliding core 16 and a one-way spring 17. The fixed core 15 is fixedly connected to one end of the valve stem 4. The sliding core 16 is slidably disposed at one end of the fixed core 15. The one-way spring 17 is disposed between the fixed core 15 and the sliding core 16.

[0024] In another embodiment of this utility model, when the medium flows through the second port 6, the valve stem 4 is rotated so that it can move along the valve cover 3. The movement of the valve stem 4 can drive the valve core 9 to move, thereby regulating and controlling the flow rate of the medium from the second port 6 to the first port 5. When oil enters the first port 5, the medium flows into the flow chamber 8 through the side hole channel 7 of the first port 5 and pushes the sliding core 16, causing the sliding core 16 to move towards the fixed core 15, thereby allowing the oil to flow directly from the first port 5 to the second port 6, thus realizing the function of a one-way valve. The first port 5 and the second port 6 are not aligned, and the valve cover 10 is installed on the valve body 1 by bolts.

[0025] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A superimposed one-way throttle valve sealing structure, comprising a valve body (1), a valve core (9), and a valve stem (4), characterized in that, The valve body (1) has a flow cavity (8) inside. The valve core (9) and the valve stem (4) are slidably disposed in the flow cavity (8). The valve core (9) is connected to the valve stem (4). A metal sealing ring (11) is provided on the periphery of the inner wall of the flow cavity (8). A plurality of sealing pads (13) are provided on one side of the metal sealing ring (11). The plurality of sealing pads (13) cooperate with the metal sealing ring (11). The metal sealing ring (11) and the sealing pads (13) are tightly fitted to the periphery of the valve stem (4).

2. The superimposed one-way throttle valve sealing structure according to claim 1, characterized in that, The metal sealing ring (11) and several sealing gaskets (13) are provided with sealing slots (12) on one side, and sealing protrusions (14) are provided on the other side of several sealing gaskets (13). The sealing protrusions (14) are inserted into the adjacent sealing slots (12).

3. The superimposed one-way throttle valve sealing structure according to claim 2, characterized in that, A valve cover (3) is provided on one side of the valve body (1). The valve cover (3) is in contact with one of the sealing gaskets (13). The valve stem (4) is located between the valve covers (3) and is threadedly connected to the valve cover (3).

4. The superimposed one-way throttle valve sealing structure according to claim 1, characterized in that, The valve body (1) has a first flow port (5) and a second flow port (6) on both sides, and the first flow port (5) and the second flow port (6) are connected to the flow cavity (8).

5. The superimposed one-way throttle valve sealing structure according to claim 4, characterized in that, A side hole flow channel (7) is provided on one side of the inner wall of the first flow port (5), and the side hole flow channel (7) is connected to the flow cavity (8).

6. The superimposed one-way throttle valve sealing structure according to claim 1, characterized in that, The valve body (1) includes a fixed core (15), a sliding core (16) and a one-way spring (17). The fixed core (15) is fixedly connected to one end of the valve stem (4). The sliding core (16) is slidably disposed at one end of the fixed core (15). The one-way spring (17) is disposed between the fixed core (15) and the sliding core (16).

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